A newly opened camp in the Turkish town of Reyhanli in Hatay province is one of many providing shelter for refugees from the violence in Syria. Estimates on the number of refugees range from 10,000 to 30,000. (Associated Press)

Robert Mueller’s special counsel investigation into Russian meddling in the 2016 election has cost $6.7 million during the first four and a half months of the probe. Click to see past independent counsel investigations guilty of racking up high bills.